If you can only afford one, I would get the drum carder. It is more versatile. You can use your drum carder as a blending board if you want and you can make regular batts or roving. I have a borrowed one at the moment. I wanted to see if I wanted one. They are fun enough to use and more portable than a drum carder. I have been making rollags for spinning and using it for demos. for spinning they are mice as you can have layers of different colours that pop out as you spin. If you can borrow one I would. Give it a try before investing. I will probably get one once the craze is over and they start popping up second hand and cheaper.